Step 1: including files
We need to include the CSpawnMenu class in our application and the Bitmap resource named IDB_MENUCHK from the sample application which comes along (it will be used to draw "check marks" aside menu item which need it - you can freely change it). 添加一个Bmp向资源中ＩＤ为IDB_MENUCHK ．We need to include th
